Facebook founder-turned-billionaire Mark Zuckerberg proved he had a sense of humor -- and proved Friday's rumors correct -- by showing up for a cameo during the monologue on Saturday Night Live. Zuckerberg read his cue cards like any true SNL first-timer, first backstage with Lorne Michaels complaining about how Andy Samberg was portraying him onstage, then interrupting Samberg and the night's host, Zuckerberg's "evil twin" Jesse Eisenberg (who portrayed him in the Oscar-nominated film, The Social Network). Turns out Zuckerberg and Eisenberg had never met until now. Awkward-berg!

Samberg left the other two bergs to take it from there. After a couple of so's...they exchanged these words...

Eisenberg: "I really liked you on 60 Minutes...You ever end up seeing the film, Social Network?"

Zuckerberg: "Yeah, I did."

Eisenberg: "What did you think of it?"

Zuckerberg: "It was interesting."

Eisenberg: "I'll take it."

They then shared the traditional monologue outro of teasing the night's musical guest and telling viewers to stick around for the great show. How about sticking around right now to watch the whole monologue again!